MESON Chess Problem Database

Problem Display
PID: 257550 (3NbB2/1PPPP1p1/1brk1r2/p2N1R2/2p2P2/7B/8/Q2R3K w - - 0 1)

Ouellet, Charles

Phenix, 2021

3NbB2/1PPPP1p1/1brk1r2/p2N1R2/2p2P2/7B/8/Q2R3K

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7
      • 2.Sxb6#
    • 1...Bxc7
      • 2.Sc3#
      • 2.Se3#
      • 2.Sb4#
      • 2.Sb6#
      • 2.Sxf6#
    • 1...Bxd7
      • 2.e8S#
    • 1...Bf7
      • 2.e8Q#
      • 2.e8B#
  • Tries
    • 1.Sb4+?
      • 1...Kxc7
        • 2.Sa6#
      • 1...Bd4!
    • 1.Sxf6+?
      • 1...Bd4
        • 2.dxe8S#
      • 1...Kxc7!
    • 1.Qe5+?
      • 1...Kxd7
        • 2.Sxb6#
        • 2.Sxf6#
      • 1...Kc5!
    • 1.Qxf6+?
      • 1...Kc5
        • 2.Qxc6#
      • 1...Kxd7
        • 2.Qxc6#
      • 1...gxf6!
    • 1.dxe8Q?
      • threat
        • 2.Qxc6#
      • 1...Rxc7
        • 2.Sxb6#
      • 1...Rc5
        • 2.Qe5#
      • 1...Kc5!
    • 1.dxe8S+?
      • 1...Kd7
        • 2.Sdxf6#
      • 1...Kc5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qxc6#
      • 1...Kc5
        • 2.Sxf6#
      • 1...Kxd7
        • 2.Rxf6#
      • 1...Rxc7
        • 2.Sxb6#
      • 1...Bxd7
        • 2.e8S#
      • 1...Rc5
        • 2.dxe8S#

This is after

After A. R. Gooderson.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK,XP(I)::R(B)+S(F),XB(c)
    • B(h);OGATE,SBLOCK,XP(J)::P=S
    • B(h);OGATE::P=Q
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);S_CUTB(c),S_FLIGHT,XP(I)::S(F)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • S(F);CHECK,XR(f)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::PXB(h)=S
      • Refutation
        • K(e);S_FLIGHT,XP(I)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);CHECK,XR(f)
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(A),XR(d)
        • K(e);OGATE,P-FLIGHT,XP(J)::QAB1(A),XR(d)
      • Refutation
        • P(g);XQ(A)
    • Try
      • P(J);XB(h)
      • Threat
        • QAR1(J),XR(d)
      • Vars
        • R(d);SBLOCK,XP(I)::R(B)+S(F),XB(c)
        • R(d);SBLOCK::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(J);CHECK,XB(h)
      • Vars
        • K(e);P-FLIGHT::R(B)+S(F),DCHECK,XR(f)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XR(d)
    • Vars
      • K(e);N_GUARD,S_CUTB(c),S_FLIGHT::R(G)+S(F),XR(f)
      • K(e);N_GUARD,P-FLIGHT,P_SPINR(d),S_CUTP(g),XP(J)::B(D)+R(G),XR(f)
      • R(d);SBLOCK,XP(I)::R(B)+S(F),XB(c)
      • B(h);OGATE,SBLOCK,XP(J)::P=S
      • R(d);SBLOCK::PXB(h)=S
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